Michael Phelps flashes his medals and girlfriend

Swimming sensation Michael Phelps went out to celebrate his achievements after winning 5 medals in the London Olympics.

He had a lot more to show off than just his smile when he went out clubbing with friends after all the swimming events got over in the Olympics.

He flashed his medals for the camera and someone was seen clinging on to him - his so called girlfriend!

The most decorated Olympian in history is reportedly dating a model and blond beauty Megan Rossee from Los Angeles.

Megan who is using Twitter handle @meganrossee has been showering supportive messages since June, when she tweeted: 'idk how to direct msg u and don't wanna wake u up but just watched your swim :) good job today and can't wait to be there @MichaelPhelps.'

The 27-year-old record-breaking swimmer seemed beaming over his new relationship with Megan.

Phelps has been dating Megan for 5 months now and the two made their first public appearance after the pair were spotted leaving House of St. Barnabas-in-Soho in London at 4am on Sunday.

She was seen clutching his arms as he waved to the camera and crowd.

She then uploaded a picture of the two on Twitter writing "Yay Michael."

Megan has been flashing her relationship with the swimmer more than necessary.

The blonde Tweeted a personal message to the most-decorated Olympian of all time, saying: '@MichaelPhelps this probably will get lost in your tweets but since i cant text i miss you and cant wait to spend time with you for real xo.'

She has also called him pet names in a number of public Tweets. 'Good luck tonight bear,' she posted on August 2, the day of the men's 200m individual medley final.

Though Rossee's Twitter handle is only about Michael, interestingly, there is no mention of Megan Rossee in Michael's account.

Rossee's appearance next to Phelps on his night out was the first time that the two had been seen out together, but they made their relationship publicly official on Monday evening when they walked the red carpet at a Speedo event in London.